Police say Goralka is a student at Walter Payton High School. He reportedly did not attend school Wednesday.
The teen was recently discharged from Children's Memorial Hospital for a blood clot in his right forearm and was given blood thinners making him susceptible to uncontrolled bleeding if injured.
According to police, Goralka is currently on anti-depressant medication.
He is described as white male, 5 ft. 9 inches, 135 lbs. with hazel eyes, brown hair and a fair complexion and freckles.
Anyone with information on his whereabouts is asked to contact Chicago police Area 3 Special Victims Unit at (312) 744-8266.